Thanks Richard, yes they are on hikari massivore. It took a long time and plenty of patience and syphoning out of uneaten food but finally they are. Thing is they seem to be only eating that now, they are less than excited when i put whitebait or prawn in. Is hikari massivore ok for them as their main diet. I've always had no trouble in feeding pellets prawns and mussels with my other rays but these seem a bit more picky.